KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes
Autor(a) principal: | |
---|---|
Data de Publicação: | 2013 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/20470 |
Resumo: | A series of doped KCa4(BO3)(3):Ln(3+) (Ln: Dy, Eu and Tb) compositions were synthesized by solid-state reaction method and their photoluminescent properties were systematically investigated to ascertain their suitability for application in white light emitting diodes. The X-ray diffraction (XRD) and nuclear magnetic resonance (MAS-NMR) data indicates that Ln(3+)-ions are successfully occupied the non-centrosymmetric Ca2+ sites, in the orthorhombic crystalline phase of KCa4(BO3)(3) having space group Ama2, without affecting the boron chemical environment. The present phosphor systems could be efficiently excitable at the broad UV wavelength region, from 250 to 350 nm, compatible to the most commonly available UV light-emitting diode (LED) chips. Photoluminescence studies revealed optimal near white-light emission for KCa4(BO3)(3) with 5 wt.% Dy3+ doping, while warm white-light (CIE; X = 0.353, Y = 0.369) is obtained at 1wt.% Dy3+ ion concentration. The principle of energy transfer between Eu3+ and Tb3+ also demonstrates the potential white-light from KCa4(BO3)(3):Eu3+, Tb3+ phosphor. Whereas, single Tb3+ and Eu3+-doped systems showed bright green (Tb3+) and red (Eu3+) emissions, respectively. Having structural flexibility along with remarkable chemical/thermal stability and suitable quantum efficiency these phosphors can be promising candidates as white-light-emitter for near UV LEDs. Copyright 2013 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4794189] |
id |
RCAP_9bafce4bac0a4ec92ba19ed2e332970f |
---|---|
oai_identifier_str |
oai:ria.ua.pt:10773/20470 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodesCA-ALPHA-SIALONLUMINESCENCE PROPERTIESCRYSTAL-STRUCTUREBAMGAL10O17-EU2+ PHOSPHORENERGY-TRANSFERPHOTOLUMINESCENCEEXCITATIONCE3+IONSSRA series of doped KCa4(BO3)(3):Ln(3+) (Ln: Dy, Eu and Tb) compositions were synthesized by solid-state reaction method and their photoluminescent properties were systematically investigated to ascertain their suitability for application in white light emitting diodes. The X-ray diffraction (XRD) and nuclear magnetic resonance (MAS-NMR) data indicates that Ln(3+)-ions are successfully occupied the non-centrosymmetric Ca2+ sites, in the orthorhombic crystalline phase of KCa4(BO3)(3) having space group Ama2, without affecting the boron chemical environment. The present phosphor systems could be efficiently excitable at the broad UV wavelength region, from 250 to 350 nm, compatible to the most commonly available UV light-emitting diode (LED) chips. Photoluminescence studies revealed optimal near white-light emission for KCa4(BO3)(3) with 5 wt.% Dy3+ doping, while warm white-light (CIE; X = 0.353, Y = 0.369) is obtained at 1wt.% Dy3+ ion concentration. The principle of energy transfer between Eu3+ and Tb3+ also demonstrates the potential white-light from KCa4(BO3)(3):Eu3+, Tb3+ phosphor. Whereas, single Tb3+ and Eu3+-doped systems showed bright green (Tb3+) and red (Eu3+) emissions, respectively. Having structural flexibility along with remarkable chemical/thermal stability and suitable quantum efficiency these phosphors can be promising candidates as white-light-emitter for near UV LEDs. Copyright 2013 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4794189]AMER INST PHYSICS2017-12-07T19:48:12Z2013-01-01T00:00:00Z2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/20470eng2158-322610.1063/1.4794189Reddy, Allu AmarnathDas, SubrataGoel, AshutoshSen, RupamSiegel, ReneeMafra, LuisPrakash, G. VijayaFerreira, Jose M. F.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-06T04:08:58Zoai:ria.ua.pt:10773/20470Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-06T04:08:58Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes |
title |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes |
spellingShingle |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes Reddy, Allu Amarnath CA-ALPHA-SIALON LUMINESCENCE PROPERTIES CRYSTAL-STRUCTURE BAMGAL10O17-EU2+ PHOSPHOR ENERGY-TRANSFER PHOTOLUMINESCENCE EXCITATION CE3+ IONS SR |
title_short |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes |
title_full |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes |
title_fullStr |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes |
title_full_unstemmed |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes |
title_sort |
KCa4(BO3)(3):Ln(3+) (Ln = Dy, Eu, Tb) phosphors for near UV excited white-light-emitting diodes |
author |
Reddy, Allu Amarnath |
author_facet |
Reddy, Allu Amarnath Das, Subrata Goel, Ashutosh Sen, Rupam Siegel, Renee Mafra, Luis Prakash, G. Vijaya Ferreira, Jose M. F. |
author_role |
author |
author2 |
Das, Subrata Goel, Ashutosh Sen, Rupam Siegel, Renee Mafra, Luis Prakash, G. Vijaya Ferreira, Jose M. F. |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Reddy, Allu Amarnath Das, Subrata Goel, Ashutosh Sen, Rupam Siegel, Renee Mafra, Luis Prakash, G. Vijaya Ferreira, Jose M. F. |
dc.subject.por.fl_str_mv |
CA-ALPHA-SIALON LUMINESCENCE PROPERTIES CRYSTAL-STRUCTURE BAMGAL10O17-EU2+ PHOSPHOR ENERGY-TRANSFER PHOTOLUMINESCENCE EXCITATION CE3+ IONS SR |
topic |
CA-ALPHA-SIALON LUMINESCENCE PROPERTIES CRYSTAL-STRUCTURE BAMGAL10O17-EU2+ PHOSPHOR ENERGY-TRANSFER PHOTOLUMINESCENCE EXCITATION CE3+ IONS SR |
description |
A series of doped KCa4(BO3)(3):Ln(3+) (Ln: Dy, Eu and Tb) compositions were synthesized by solid-state reaction method and their photoluminescent properties were systematically investigated to ascertain their suitability for application in white light emitting diodes. The X-ray diffraction (XRD) and nuclear magnetic resonance (MAS-NMR) data indicates that Ln(3+)-ions are successfully occupied the non-centrosymmetric Ca2+ sites, in the orthorhombic crystalline phase of KCa4(BO3)(3) having space group Ama2, without affecting the boron chemical environment. The present phosphor systems could be efficiently excitable at the broad UV wavelength region, from 250 to 350 nm, compatible to the most commonly available UV light-emitting diode (LED) chips. Photoluminescence studies revealed optimal near white-light emission for KCa4(BO3)(3) with 5 wt.% Dy3+ doping, while warm white-light (CIE; X = 0.353, Y = 0.369) is obtained at 1wt.% Dy3+ ion concentration. The principle of energy transfer between Eu3+ and Tb3+ also demonstrates the potential white-light from KCa4(BO3)(3):Eu3+, Tb3+ phosphor. Whereas, single Tb3+ and Eu3+-doped systems showed bright green (Tb3+) and red (Eu3+) emissions, respectively. Having structural flexibility along with remarkable chemical/thermal stability and suitable quantum efficiency these phosphors can be promising candidates as white-light-emitter for near UV LEDs. Copyright 2013 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4794189] |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-01-01T00:00:00Z 2013 2017-12-07T19:48:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/20470 |
url |
http://hdl.handle.net/10773/20470 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2158-3226 10.1063/1.4794189 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
AMER INST PHYSICS |
publisher.none.fl_str_mv |
AMER INST PHYSICS |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
mluisa.alvim@gmail.com |
_version_ |
1817543636616740864 |